(ii) 9(2x – 3y)2 + 12(2x – 3y) + 4(2x + 3y)2
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Step-by-step explanation:
(18x-27y)2+(24x-36y)+(8x+12y)2
=36x-54y+24x-36y+16x+24y
=76x-66y
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